Still playing with that technique. BMO is from Adventure Time and belongs to Pendtleton Ward and Nickelodeon.
This next one was me playing with colored inks. It did some pretty unexpected things. The pigment bled into the paper underneath the guache, so there was some residual color left when it was washed away (The ink was brick red but it bled pink under the guache). Also, this ink isn't as permanent as the black I've been using, and much of it was washed away, leaving a strange bluish tone and a faded look. It was so neat to discover!
I am still loving this technique. Gunna keep it up!